... To assess whether the airborne fraction is indeed increasing, Wolfgang Knorr of the Department of Earth Sciences at the University of Bristol reanalyzed available atmospheric carbon dioxide and emissions data since 1850 and considers the uncertainties in the data.

In contradiction to some recent studies, he finds that the airborne fraction of carbon dioxide has not increased either during the past 150 years or during the most recent five decades.

The research is published in Geophysical Research Letters.

Article here. Hopefully we'll start to see more published research presenting a more balanced (and rigorous science-based) examination of AGW, now that the ClimateGate scandal has exposed the practices of the loudest AGW "scientists" and their apparent effort to manipulate data and/or results and suppress conflicting research.